Basically copy coupon, view price history or create e-mail price alert. Best price?
Chipset: Allwinner V3, Screen resolution: 320×240, Battery Capacity (mAh): 900mAh, Wide Angle: 170 degree wide angle, Working Time: 1.5h
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Price history and price alert
Here is price history (for all/most countries) for DveeTech S2 Action Camera.
Price records source(s): Gearbest
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).